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Utility Regulatory Assets and Liabilities and Regulatory Matters (Tables)
9 Months Ended
Jun. 30, 2022
Regulated Operations [Abstract]  
Schedule of Regulatory Assets The following regulatory assets and liabilities associated with Utilities are included on the Condensed Consolidated Balance Sheets:
June 30,
2022
September 30,
2021
June 30,
2021
Regulatory assets (a):
Income taxes recoverable$151 $143 $131 
Underfunded pension and postretirement plans103 108 166 
Environmental costs34 58 58 
Deferred fuel and power costs14 11 — 
Removal costs, net22 24 24 
Other47 53 17 
Total regulatory assets$371 $397 $396 
Regulatory liabilities (a):
Postretirement benefit overcollections$12 $13 $12 
Deferred fuel and power refunds36 21 
State tax benefits — distribution system repairs34 32 30 
Excess federal deferred income taxes281 287 269 
Other20 
Total regulatory liabilities$336 $388 $334 
(a)Current regulatory assets are included in “Prepaid expenses and other current assets” and regulatory liabilities are included in “Other current liabilities” and “Other noncurrent liabilities” on the Condensed Consolidated Balance Sheets.
Schedule of Regulatory Liabilities The following regulatory assets and liabilities associated with Utilities are included on the Condensed Consolidated Balance Sheets:
June 30,
2022
September 30,
2021
June 30,
2021
Regulatory assets (a):
Income taxes recoverable$151 $143 $131 
Underfunded pension and postretirement plans103 108 166 
Environmental costs34 58 58 
Deferred fuel and power costs14 11 — 
Removal costs, net22 24 24 
Other47 53 17 
Total regulatory assets$371 $397 $396 
Regulatory liabilities (a):
Postretirement benefit overcollections$12 $13 $12 
Deferred fuel and power refunds36 21 
State tax benefits — distribution system repairs34 32 30 
Excess federal deferred income taxes281 287 269 
Other20 
Total regulatory liabilities$336 $388 $334 
(a)Current regulatory assets are included in “Prepaid expenses and other current assets” and regulatory liabilities are included in “Other current liabilities” and “Other noncurrent liabilities” on the Condensed Consolidated Balance Sheets.